BIOL 76168

subject Type Homework Help
subject Pages 11
subject Words 1818
subject Authors Cecie Starr, Christine Evers, Lisa Starr, Ralph Taggart

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The sex chromosome composition of a person with Turner syndrome is
a. XXX.
b. XO.
c. XXY.
d. XYY.
e. none of these.
The presence of the strongest competitors in the center of a group of animals may
qualify the group for status as a(n)
a. altruistic society.
b. selfish herd.
c. kin group.
d. dominance hierarchy.
e. sexual selection society.
Lamarck believed
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a. that a substance called fluida moved through the nerves to areas of the body in need
of change.
b. in the inheritance of acquired characteristics.
c. that giraffes' necks elongated in response to stretching.
d. that environmental pressures bring about changes in organisms.
e. all of these were true.
Homeotic genes
a. cause lethal mutations.
b. regulate development of specific body parts.
c. are found only in fruit flies, where they are responsible for odd placement of
appendages.
d. produce "fate maps."
e. form as blocks of genes in cells randomly distributed throughout the body.
The following items are organelles found in animal cells. Respond to the statements
below with reference to these organelles.
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a. ribosome
b. mitochondrion
c. lysosome
d. Golgi body
e. endoplasmic reticulum
Sugar metabolism occurs in association with this organelle.
A hydrogen bond is a(n)
a. sharing of a pair of electrons between a hydrogen and an oxygen nucleus.
b. sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a
nitrogen nucleus.
c. attractive force between a hydrogen atom and either an oxygen or a nitrogen atom
that are in other molecules or within the same molecule.
d. covalent bond between two hydrogen atoms.
e. covalent bond between a hydrogen atom and either an oxygen atom or a nitrogen
atom.
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Stem cells show promise for mending damage due to
a. spinal cord injuries.
b. Parkinson's disease.
c. muscular dystrophy.
d. heart attacks.
e. all of these.
In mice the allele for colored fur (C) is dominant to the allele for albinism (c). The
allele for normal behavior (W) is dominant to that for waltzing movement (w). Give the
probable genotypes of the parents if they produced the offspring listed after the
following crosses:
(a) colored normal x white waltzer produced 10 colored normal, 8 colored waltzers, 2
white waltzers, 11 white normal
(b) colored normal x white normal produced 35 colored normal, 13 colored waltzers
(c) colored normal x colored normal produced 37 colored normal, 14 colored waltzers,
9 white normal, and 5 white waltzers
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Congenital deafness in humans is due to the homozygous condition of either of the
recessive genes d or e, or both of these genes. Both dominant D and E are necessary for
normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It
does not matter how good the normal inner ear (as indicated by E__) is; if there is
something wrong in the middle ear, the individual is unable to hear. The same applies
for the other gene. Give the phenotypic results of the following crosses:
(a) Dd EE x Dd EE
(b) Dd Ee x Dd Ee
(c) dd EE x DD ee
(d) Dd EE x Dd ee
(e) Dd EE x DD Ee
Respond to the following statements in reference to the five endocrine glands listed
below.
a. pituitary
b. adrenal
c. pancreas
d. thyroid
e. thymus
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Oxytocin is released from this gland.
The animal in the above diagram has
a. an open circulatory system.
b. no capillaries.
c. a closed circulatory system.
d. spaces in the tissues for blood to pool in.
e. none of these.
Antibodies are classified as
a. nucleoproteins.
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b. immunoglobulins.
c. polysaccharides.
d. steroids.
e. lipids.
Answer the following questions in reference to the five divisions of vascular plants
listed below.
a. lycophytes
b. bryophytes
c. monocots
d. conifers
e. eudicots
Members of this group have seeds containing two cotyledons enclosed in an ovary.
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The source of blood for the glomerular capillaries is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
sphincter
Choose the one most appropriate statement for each.
a. made in the small intestine and pancreas; act on peptide fragments
b. glucose, fructose, and galactose are examples
c. made in the pancreas; acts on fats
d. made by the pancreas and salivary glands; acts on starch
e. made by the small intestine; acts on double sugars
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f. made by the pancreas; acts on proteins and polypeptides
g. contains cholesterol; helps emulsify fats
h. made in the stomach; acts on proteins
i. stimulates hydrochloric acid secretion
j. circular muscle acts like valve
How many net ATP are generated in aerobic respiration?
a. 2
b. 8
c. 10
d. 32
e. 36
Breaking actin-myosin bonds requires
a. ATP.
b. ADP.
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c. calcium.
d. phosphorus.
e. sodium.
Neurotransmitter molecule
Choose the most appropriate answer.
a. integrates body position, motions, balance
b. in cnidarians; based on reflex pathways devoted to swimming and feeding
c. messages from here arouse the brain and maintain wakefulness
d. the cortical region that coordinates muscles required for speech
e. all parts of nerve cells outside the brain and spinal cord
f. acetylcholine is an example
g. reflex control center for breathing, heart rate, and blood pressure
h. axons of the central nervous system that are sheathed with fatty myelin
i. at top of the brainstem bordering the cerebral hemispheres; influences learning and
emotional behavior
j. motor neurons that are divided into sympathetic and parasympathetic divisions
k. membrane coverings over brain spinal cord
l. contains the tectum; receives and integrates sensory information that is largely sent on
to the forebrain for further neural processing
m. connects right and left cerebral hemispheres
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n. group of nerve cell bodies that form an integrative center
o. contains centers concerned with body temperature regulation and with salt and water
balance
For the following statements select the best choice of the four evolutionary processes
listed below.
a. mutation
b. gene flow
c. genetic drift
d. natural selection
This process produces new genetic variation within a species.
Respond to the following statements with reference to the five terms listed below,
which are used by ecologists.
a. carrying capacity
b. net reproduction per individual per unit time
c. age structure
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d. survivorship
e. growth rate
The maximum number of individuals that a given habitat can support is this.
Respond to the following statements in reference to the four kinds of social behavior
listed below.
a. altruism
b. cooperation
c. selfish herd behavior
d. subordination
When two or more female lions attack a wildebeest together, this is an example of
__________.
The stages of mitosis plus interphase are listed below. Select the correct phase for each
of the following statements.
a. interphase
b. prophase
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c. metaphase
d. anaphase
e. telophase
Sister chromatids joined at their centromeres are attached to spindle fibers.
Which of the following molecules does NOT have a total of three carbon atoms?
a. PEP
b. PGAL
c. fructose-1, 6-biphosphate
d. pyruvate
e. phosphoglycerate (PGA)
The significance of the Hershey and Chase experiments in which 32P and 35S were used
is that
a. DNA labeled with 35S and proteins labeled with 32P can be traced in the course of an
experiment.
b. they demonstrated that DNA labeled with 32P is transferred from the bacteriophage to
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the virus.
c. they established that proteins labeled with 35S become deactivated and unable to be
transferred.
d. they demonstrated that bacteriophages transfer their DNA, not their protein coats,
into their hosts.
e. DNA may be the hereditary material; although, bacteriophages transfer both DNA
and proteins into their hosts.
In the spiral staircase model of DNA, the rungs are
a. deoxyribose sugars.
b. hydrogen bonds.
c. nucleotide base pairs.
d. phosphate groups.
e. composed of all of these.
In humans, the thirst center is located in the
a. adrenal cortex.
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b. hypothalamus.
c. anterior pituitary.
d. glomerulus.
e. stomach.
The two steps of transcription followed by translation
a. explain the structural complexity of genes.
b. describe the flow of genetic information.
c. are based upon the role of proteins in controlling life.
d. do not explain how genes function.
e. explain evolution in terms of molecular biology.
Nirenberg, Leder
Choose the best matching element.
a. deciphered the mRNA code words
b. RNA-directed synthesis of polypeptide chains
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c. sites at which RNA polymerases can bind and initiate transcription
d. binds to small subunit platform of a ribosome
e. guided and catalyzed by RNA polymerases
f. polypeptide chain elongation proceeds independently at each body in this cluster
g. discovered transposons
h. a tRNA triplet opposite a codon
i. a set of three nucleotides
A chromosome's gene sequence that was ABCDEFG before modification and
ABCDCDEFG afterward is an example of
a. inversion.
b. deletion.
c. duplication.
d. translocation.
e. aneuploidy.
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Choose the one most appropriate answer for each.
a. gives rise to periderm
b. nucleate phloem cells that help load and unload the phloem
c. dead cells with perforation plates; more efficient at water conduction than other
xylem cells
d. living nonnucleated cells that conduct food from photosynthetic source area to
storage sink area
e. a cylinder of parenchyma cells outside the vascular tissue but inside the endodermis
f. clusters of strands containing xylem, phloem, and vascular cambium
g. dead cells without perforation plates; the principal xylem cells of nonflowering
vascular plants
h. cells with thick secondary walls impregnated with lignin that are especially abundant
in some fruits and seeds
i. the principal photosynthetic region of a leaf
j. regions that can undergo mitosis
k. gas exchange and storage plus photosynthesis
Meristems

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